i have never seen such poor advice than on this forum. the stock turbo will take a max of 1.1 bar. you do need to have the correct fuelling mods to do this though. i.e, a rising rate fuel pressure regulator, and a Fuel Cut Defender at the very very least, and get it setup on an rr. you will also need a new manifold, as the restriction in runner 3 on the stock manifold will kill the piston and rings in cylinder 3. meaning you will have to rebuild or replace your engine. which is costly. you may already have an fcd seeing as the ecu will hit fuel cut at 0.85bar, or if your really lucky an aftermarket ecu. first i would check all boost pipes and hoses, for splits and any form of leaks then i would do a compression test and make sure its not the engine. then providing all was a ok, i would replace the turbo.